The fully automatic hydro-powered flood barrier, requiring no electricity and operating unattended, has become a core flood prevention equipment for subways. It is currently deployed in subway stations across 16 cities including Shenzhen, Zhengzhou, and Beijing. This product employs a purely physical principle, utilizing water buoyancy for automatic lifting and lowering. When not in use, it lies flat like a speed bump without obstructing traffic. During flooding, it can rise to block water within 2.5 seconds. The 22.3-meter ultra-wide flood barrier installed at Guangzhou Metro's Shitan Station successfully withstood intense water pressure during testing. The pilot product on Beijing Subway Line 14 integrates 24/7 real-time monitoring, automatically adjusting the gate angle based on water levels. Its modular soft-connection design adapts to uneven surfaces, while the ultra-thin structure enables rapid surface installation. This innovation eliminates the pain points of traditional flood barriers—manual operation and delayed response.